Latch



Y A vjulle 25, 1929. M Y L, JANOlR 1,718,650

LATCH Filed Aug. 22, 1927 Ll l) Patented June 25, 1929.

Unirse STATES PArETrFicr..

LOUIS JANOIR, OF ST.-OUEN, FRANCE.

LATCH.

Application filed August 22, 1927, Serial No. 214,767, and in FranceAugust 27, 195% The present invention has :tor its object the provisionot' a latch more particularly applicable tor fastening' the doors otmotor car bodies.

'lhe latch is ot such construction that its bolt Ais constituted by arod or lstem at right angles to the door, capable ot rotation andprovided with side projections, which, upon closing ot the door,encountering abutnients carried by the keeper, pass over theseabutinents, by causing the bolt to turn, and tall. back behind theseabutments under the action ot a spring.

Preferably, the side projections of the bolt have the ,general shape o'lwedges, the points olf which are set in the returning direction ot thebolt and the abutinents ot the staple are constituted by wedgesreversely set.

@wing to these arrai'igements, the latch in accordance with theinvention ensures a closure without play, whatever 'may be the degree ofwear of the meinliers in contact, the fastening ol,E "he door againstAthe `fixed corresponding part being always realized by the action oi'the spring on the bolt.

Another'fiature ot the latch in accori'lanee with the .inventionconsists in the ari-alarenient oit the door and the fixed correspondingpart, of tapered niale and len'iale ineinbers, respectively, concentricwith the bol t, which lit into each other upon closing, ensuring` at thesaine time the centering.

'lhe areoiniiianying drawing` illustrates, by way ot example, one of theforms oit` execu tion ot' the latch in accordance with the invention.

Fig. l is a front View of the keeper.

Fig. 2 is a longitudinal section of the latch througli an axial plane;it shows the latch before engagement.

Fig. 3 is a section similar to the preceding one, but it shows the latchafter engagement.

litiga 4; .is a diagrammatic end "View ot the bolt.

The door 'l carries a casing 2 wherein is iournalled, at right angles tothe door, cylindrical rod 3 constituting` the bolt. The rod 3 can rotateabout its axis, but is preveiited 'from having any longitudinal movementby a suitable abutment, such as a lever t rigidly mounted on the saidrod and held between the door and the casing 2. The rod 3 is broughtback, in the direction ot the arrow (Fig. 3), by a spiral spring 5 (Fig.

4), or any the lever a.

Opposite the bolt, the door irainereceives the keeper (i, perforatedwith a circular opening on the walls' of which are distributed abutments7, oit wedge shape having side] ,faces constitii'ted by helical inclinesit, i).

The corresponding end ol the bolt 3 earries side pioiections S (Fig. et)having; a shape similar to that oit the abutinents L However, the wedgeswhich are formed by the projections 8 are set in reverse direction tothose constituting the abutnients 7, Vthat is to say their points areturned, towards the direction in which the bolt is turned by the spring-5. The other end oli the bolt is provided with an operating. handle (notshown).

Concentrieally with its central opening, the staple is provided with atemale frusta conical bearingl portion 9 to which corresponds, on theeasingl 2, a male truste-conical bearing,- portion l0. Near the end ol'this male bearingi portion, the casing transversely ont away :for givingpassage to the abutments ot the keeper, upon closing oi the door.

AWhen thc door is pushed, the side projections ol the bolt come incontact with the abutinents oit the keeper. The inclines, forming theside-:faces oi" the said side projeetious and abutlnents, determine therotin tion ot the bolt in the direction ot the arrow o (Fie: 2), during`the time the door continues its movement. At the saine time, the spring5 is put under tension and as soon as the infojr-ictions ot the bolthave passed beyond the points ot' the abutnieiits ot the keeper, theytall back behind these abut nients and the sprinpr 5 brings hack thebolt in the direction oit the arrow Y). By pressing a gainst each otherthe respi-xctive bearing portions ot the casing and ot the staple.prevent rattling, owingto their tapered torni and the sungengagementellectcd by the projections 8 and the abutn'ients 7.

The returning inovenieiit ol the bolt by the springl Ii is not lin'iitedin a positive manner; therefore, it stops only when the bearing portionsoit the casing and olA the keeper are lirnily pressed against eachother, Thus doingv away with play.

Opening ol the door is otlfeeted by turning' the handle in the directionot the arrow a, and by pulling` the door open.

other resilient means, acting on l (l fi lll) It is obvious that thedirections of rotation can be reversed according to the shape or thearrangement of the handle. Moreover, the invention is not, of course,limited to the exact details of construction described and illustrated.Thus, the male and female bearing portions of the casing and of thekeeper can have another shape than that of a irustuni and can be ofcylindrical, cylindro-conical, spherical or like Shapes, provided thetwo corresponding parte are capable of snug interfitting with eachother.

I claim:

A latch 'for motor car body and other doors, 4comprising a rotating boltsubjected to the .reaction of a spring and a lixed keeper forvreceiving-the said bolt, a member for anchorage on the door and providedwith a conical nipple drilled in order toserve as a bearing for thefront part of the bolt, a keeper for anchorage on a part fixed withrespect to the door and provided with a circular recess enlarged at itsfront part for providing a conical surface upon which the conical nippletakes a bearing when the door is closed, radial protrudingr parts on thebolt having two faces converging in the direction .of the rotation of`the holt when the saine is acted upon by the spring, radialcorresponding protruding parts provided on rhikeeper internally to thecirculnr receas of the lultter, and having faces converging in :inopposite direction to the corresponding faces of the protruding parte ofthe bolt.

In testimony whereof I have Signed my. name to this specification.

LOUIS JANOIR.

